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st/glx: Return a better format in choose_depth_stencil_format. 

Return a better format instead of an exact format in
choose_depth_stencil_format.  Also, prefer formats with stencil bits.
This commit is contained in:
Chia-I Wu 2010-03-12 11:20:27 +08:00
parent 72ed7eb15a
commit 3475e88442
1 changed files with 9 additions and 13 deletions
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22
src/gallium/state_trackers/glx/xlib/xm_api.c
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@ -274,7 +274,8 @@ choose_pixel_format(XMesaVisual v)
}
/**
* Choose a depth/stencil format for the given depth and stencil sizes.
* Choose a depth/stencil format that is "better" than the given depth and
* stencil sizes.
*/
static enum pipe_format
choose_depth_stencil_format(int depth, int stencil)
@ -289,21 +290,16 @@ choose_depth_stencil_format(int depth, int stencil)
assert(screen);
count = 0;
switch (depth) {
case 16:
if (!stencil)
formats[count++] = PIPE_FORMAT_Z16_UNORM;
break;
case 24:
if (depth <= 24 && stencil <= 8) {
formats[count++] = PIPE_FORMAT_S8Z24_UNORM;
formats[count++] = PIPE_FORMAT_Z24S8_UNORM;
break;
case 32:
if (!stencil)
}
if (!stencil) {
if (depth <= 16)
formats[count++] = PIPE_FORMAT_Z16_UNORM;
if (depth <= 32)
formats[count++] = PIPE_FORMAT_Z32_UNORM;
break;
default:
break;
}
fmt = PIPE_FORMAT_NONE;